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Initial surface failure and wear of cemented carbides in sliding contact with different rock types
Dalarna University, School of Technology and Business Studies, Materials Technology. Uppsala universitet.
2018 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 408-409, p. 43-55Article in journal (Refereed) Published
Abstract [en]

The initial wear, deformation and degradation of cemented carbide in contact with different rock types are studied using a crossed cylinder sliding test. The sliding distance is limited to centimetres at a time, interrupted by successive SEM analysis. This allows for careful studies of the gradually changing microstructure of the cemented carbide during the test. Five different rock types are included; granite, metal sulphide ore, mica schist, quartzite and marble. All rock types are very different in microstructure, composition and properties. The cemented carbide grade used for the evaluation contains 6 wt% Co and fine (~ 1 µm) WC grains, a grade commonly used in rock drilling. The results show that the cemented carbide microstructure becomes altered already during the very first contact with rock. The initial wear rate and wear character is highly influenced by the rock type. The initial wear of the cemented carbide is highest against quartzite and lowest against marble.

Place, publisher, year, edition, pages
2018. Vol. 408-409, p. 43-55
Keyword [en]
Cemented carbides, Deformation, Rock drilling, Sliding, Wear
National Category
Materials Engineering
Research subject
Steel Forming and Surface Engineering
Identifiers
URN: urn:nbn:se:du-27728DOI: 10.1016/j.wear.2018.04.017Scopus ID: 2-s2.0-85046810901OAI: oai:DiVA.org:du-27728DiVA, id: diva2:1210259
Available from: 2018-05-28 Created: 2018-05-28 Last updated: 2018-06-05Bibliographically approved

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Olsson, Mikael

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